positiveとは意味・読み方・使い方

語源

From Old French positif, from Latin positivus, from the past participle stem of ponere (“to place”). Compare posit.

発音

• (Received 発音) IPA^(key): /ˈpɒzɪtɪv/
• (General American) enPR: pŏzʹĭ-tĭv, IPA^(key): /ˈpɑzɪtɪv/
• 韻: -ɒzɪtɪv
• ハイフネーション (英国発音): pos‧it‧ive, (米国発音): pos‧i‧tive

形容詞

positive (comparative more positive, superlative most positive)

1. Not negative or neutral.
2. (law) Formally laid down. [from the 14th c.]
   • 1594, Richard Hooker, Of the Lawes of Ecclesiastical Politie

     In laws, that which is natural bindeth universally; that which is positive, not so.

3. Stated definitively and without qualification. [from the 16th c.]
   • 1622, Francis, Lord Verulam, Viscount St. Alban [i.e. Francis Bacon], The Historie of the Raigne of King Henry the Seventh, […], London: […] W[illiam] Stansby for Matthew Lownes, and William Barret, OCLC 1086746628:

     Positive words, that he would not bear arms against King Edward’s son.

4. Fully assured in opinion. [from the 17th c.]

   Synonyms: certain, sure, wis

   Antonyms: uncertain, unsure

   I’m absolutely positive you've spelt that wrong.

5. (mathematics) Of number, greater than zero. [from the 18th c.]

   Antonym: nonpositive

6. Characterized by constructiveness or influence for the better.
   • 1701, [Jonathan Swift], “Chapter I”, in A Discourse of the Contests and Dissensions between the Nobles and the Commons in Athens and Rome, with the Consequences They Had upon Both Those States, London: […] John Nutt […], OCLC 863434346, page 11:

     Not to conſent to the Enacting of ſuch a Law, which has no view beſide to general Good, unleſs another Law ſhall at the ſame time paſs, with no other view but that of advancing the Power of one Party alone; What is this but to claim a positive Voice as well as a negative?

7. Overconfident, dogmatic.
   • 1709, [Alexander Pope], An Essay on Criticism, London: […] W. Lewis […], published 1711, OCLC 15810849:

     Some positive, persisting fops we know, That, if once wrong, will needs be always so.

9. (chiefly philosophy) Actual, real, concrete, not theoretical or speculative.
   • 1597, Francis [Bacon], “Of the Colours of Good and Evill, a Fragment”, in The Essayes […], 3rd edition, London: […] Iohn Haviland […], published 1632, OCLC 863527675:

     [I]f the privation be good, it followes not the former condition was evill, but lesse good; for the flower or blossome, is a positive good, although the remove of it to give place to the fruit, be a comparative good.

   • 1885, Marcellin Berthelot, Les Origines de l'Alkimie as quoted in M. M. Pattison Muir, A History of Chemical Theories and Laws, 1907.

     Chemistry is not a primitive science, like geometry or astronomy; it is constructed from the debris of a previous scientific formation; a formation half chimerical and half positive...

10. (physics) Having more protons than electrons.

    Antonym: negative

    A cation is a positive ion as it has more protons than electrons.

11. (grammar) Describing the primary sense of an adjective, adverb or noun; not comparative, superlative, augmentative nor diminutive.

    ‘Better’ is an irregular comparative of the positive form ‘good’.

12. Derived from an object by itself; not dependent on changing circumstances or relations.

    Synonym: absolute

    The idea of beauty is not positive, but depends on the different tastes of individuals.

    positive knowledge

13. Characterized by the existence or presence of distinguishing qualities or features, rather than by their absence.

    The box was not empty – I felt some positive substance within it.

15. Characterized by the presence of features which support a hypothesis.

    The results of our experiment are positive.

16. (photography) Of a visual image, true to the original in light, shade and colour values.

    A positive photograph can be developed from a photographic negative.

17. Favorable, desirable by those interested or invested in that which is being judged.

    The first-night reviews were largely positive.

18. Wholly what is expressed; colloquially downright, entire, outright.

    Good lord, you've built up a positive arsenal of weaponry here.

19. Optimistic. [from the 20th c.]

    He has a positive outlook on life.

20. (chemistry) electropositive
21. (chemistry) basic; metallic; not acid; opposed to negative, and said of metals, bases, and basic radicals.
22. (slang) HIV positive.
    • quoted in 2013, William I. Johnston, HIV-Negative: How the Uninfected Are Affected by AIDS (page 145)

      We certainly told him at that time that I was negative. We talked about transmission. We told him we don't do anything that would cause me to become positive.

23. (New Age jargon) Good, desirable, healthful, pleasant, enjoyable; (often precedes 'energy', 'thought', 'feeling' または 'emotion').
    • 2009, Christopher Johns, Becoming a Reflective Practitioner, John Wiley & Sons, p. 15

      Negative feelings can be worked through and their energy converted into positive energy... In crisis, normal patterns of self-organization fail, resulting in anxiety (negative energy). Being open systems, people can exchange this energy with the environment and create positive energy for taking action...

派生語

名詞

positive (複数形 positives)

1. A thing capable of being affirmed; something real or actual.
   • 1692–1717, Robert South, Twelve Sermons Preached upon Several Occasions, volume (please specify |volume=I to VI), 6th edition, London: […] J[ames] Bettenham, for Jonah Bowyer, […], published 1727, OCLC 21766567:

     rating Positives by their Privatives

2. A favourable point or characteristic.
3. Something having a positive value in physics, such as an electric charge.
4. (grammar) A degree of comparison of adjectives and adverbs.
5. (grammar) An adjective or adverb in the positive degree.
6. (photography) A positive image; one that displays true colors and shades, as opposed to a negative.
7. The positive plate of a voltaic or electrolytic cell.
8. A positive result of a test.